Online Assessment

In-Memory File System OA, Four Levels Deep

AirbnbSoftware Engineer · Online Assessment · Aug 2026

The OA was an in-memory file system design problem: add files, copy files search files with prefix and suffix add users with capacity, add files by user, update user capacity compress and decompress files L1 and L2 were pretty straightforward. L3 required handling the relationship between users and files, and you had to modify the copy_file from L2. The copied file also has a size, and if size >…

Shared by a candidate · reported Aug 2026. Interview formats change; use it as a guide, not a script.